1 /* 2 * Copyright (c) 2005-2011 Atheros Communications Inc. 3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include "core.h" 19 #include "hif.h" 20 #include "debug.h" 21 22 /********/ 23 /* Send */ 24 /********/ 25 26 static void ath10k_htc_control_tx_complete(struct ath10k *ar, 27 struct sk_buff *skb) 28 { 29 kfree_skb(skb); 30 } 31 32 static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar) 33 { 34 struct sk_buff *skb; 35 struct ath10k_skb_cb *skb_cb; 36 37 skb = dev_alloc_skb(ATH10K_HTC_CONTROL_BUFFER_SIZE); 38 if (!skb) 39 return NULL; 40 41 skb_reserve(skb, 20); /* FIXME: why 20 bytes? */ 42 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb"); 43 44 skb_cb = ATH10K_SKB_CB(skb); 45 memset(skb_cb, 0, sizeof(*skb_cb)); 46 47 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: skb %pK\n", __func__, skb); 48 return skb; 49 } 50 51 static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc, 52 struct sk_buff *skb) 53 { 54 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); 55 56 dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 57 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 58 } 59 60 static void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep, 61 struct sk_buff *skb) 62 { 63 struct ath10k *ar = ep->htc->ar; 64 65 ath10k_dbg(ar, ATH10K_DBG_HTC, "%s: ep %d skb %pK\n", __func__, 66 ep->eid, skb); 67 68 ath10k_htc_restore_tx_skb(ep->htc, skb); 69 70 if (!ep->ep_ops.ep_tx_complete) { 71 ath10k_warn(ar, "no tx handler for eid %d\n", ep->eid); 72 dev_kfree_skb_any(skb); 73 return; 74 } 75 76 ep->ep_ops.ep_tx_complete(ep->htc->ar, skb); 77 } 78 79 static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep, 80 struct sk_buff *skb) 81 { 82 struct ath10k_htc_hdr *hdr; 83 84 hdr = (struct ath10k_htc_hdr *)skb->data; 85 86 hdr->eid = ep->eid; 87 hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr)); 88 hdr->flags = 0; 89 hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE; 90 91 spin_lock_bh(&ep->htc->tx_lock); 92 hdr->seq_no = ep->seq_no++; 93 spin_unlock_bh(&ep->htc->tx_lock); 94 } 95 96 int ath10k_htc_send(struct ath10k_htc *htc, 97 enum ath10k_htc_ep_id eid, 98 struct sk_buff *skb) 99 { 100 struct ath10k *ar = htc->ar; 101 struct ath10k_htc_ep *ep = &htc->endpoint[eid]; 102 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); 103 struct ath10k_hif_sg_item sg_item; 104 struct device *dev = htc->ar->dev; 105 int credits = 0; 106 int ret; 107 108 if (htc->ar->state == ATH10K_STATE_WEDGED) 109 return -ECOMM; 110 111 if (eid >= ATH10K_HTC_EP_COUNT) { 112 ath10k_warn(ar, "Invalid endpoint id: %d\n", eid); 113 return -ENOENT; 114 } 115 116 skb_push(skb, sizeof(struct ath10k_htc_hdr)); 117 118 if (ep->tx_credit_flow_enabled) { 119 credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); 120 spin_lock_bh(&htc->tx_lock); 121 if (ep->tx_credits < credits) { 122 ath10k_dbg(ar, ATH10K_DBG_HTC, 123 "htc insufficient credits ep %d required %d available %d\n", 124 eid, credits, ep->tx_credits); 125 spin_unlock_bh(&htc->tx_lock); 126 ret = -EAGAIN; 127 goto err_pull; 128 } 129 ep->tx_credits -= credits; 130 ath10k_dbg(ar, ATH10K_DBG_HTC, 131 "htc ep %d consumed %d credits (total %d)\n", 132 eid, credits, ep->tx_credits); 133 spin_unlock_bh(&htc->tx_lock); 134 } 135 136 ath10k_htc_prepare_tx_skb(ep, skb); 137 138 skb_cb->eid = eid; 139 skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); 140 ret = dma_mapping_error(dev, skb_cb->paddr); 141 if (ret) { 142 ret = -EIO; 143 goto err_credits; 144 } 145 146 sg_item.transfer_id = ep->eid; 147 sg_item.transfer_context = skb; 148 sg_item.vaddr = skb->data; 149 sg_item.paddr = skb_cb->paddr; 150 sg_item.len = skb->len; 151 152 ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1); 153 if (ret) 154 goto err_unmap; 155 156 return 0; 157 158 err_unmap: 159 dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); 160 err_credits: 161 if (ep->tx_credit_flow_enabled) { 162 spin_lock_bh(&htc->tx_lock); 163 ep->tx_credits += credits; 164 ath10k_dbg(ar, ATH10K_DBG_HTC, 165 "htc ep %d reverted %d credits back (total %d)\n", 166 eid, credits, ep->tx_credits); 167 spin_unlock_bh(&htc->tx_lock); 168 169 if (ep->ep_ops.ep_tx_credits) 170 ep->ep_ops.ep_tx_credits(htc->ar); 171 } 172 err_pull: 173 skb_pull(skb, sizeof(struct ath10k_htc_hdr)); 174 return ret; 175 } 176 177 void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb) 178 { 179 struct ath10k_htc *htc = &ar->htc; 180 struct ath10k_skb_cb *skb_cb; 181 struct ath10k_htc_ep *ep; 182 183 if (WARN_ON_ONCE(!skb)) 184 return; 185 186 skb_cb = ATH10K_SKB_CB(skb); 187 ep = &htc->endpoint[skb_cb->eid]; 188 189 ath10k_htc_notify_tx_completion(ep, skb); 190 /* the skb now belongs to the completion handler */ 191 } 192 EXPORT_SYMBOL(ath10k_htc_tx_completion_handler); 193 194 /***********/ 195 /* Receive */ 196 /***********/ 197 198 static void 199 ath10k_htc_process_credit_report(struct ath10k_htc *htc, 200 const struct ath10k_htc_credit_report *report, 201 int len, 202 enum ath10k_htc_ep_id eid) 203 { 204 struct ath10k *ar = htc->ar; 205 struct ath10k_htc_ep *ep; 206 int i, n_reports; 207 208 if (len % sizeof(*report)) 209 ath10k_warn(ar, "Uneven credit report len %d", len); 210 211 n_reports = len / sizeof(*report); 212 213 spin_lock_bh(&htc->tx_lock); 214 for (i = 0; i < n_reports; i++, report++) { 215 if (report->eid >= ATH10K_HTC_EP_COUNT) 216 break; 217 218 ep = &htc->endpoint[report->eid]; 219 ep->tx_credits += report->credits; 220 221 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", 222 report->eid, report->credits, ep->tx_credits); 223 224 if (ep->ep_ops.ep_tx_credits) { 225 spin_unlock_bh(&htc->tx_lock); 226 ep->ep_ops.ep_tx_credits(htc->ar); 227 spin_lock_bh(&htc->tx_lock); 228 } 229 } 230 spin_unlock_bh(&htc->tx_lock); 231 } 232 233 static int ath10k_htc_process_trailer(struct ath10k_htc *htc, 234 u8 *buffer, 235 int length, 236 enum ath10k_htc_ep_id src_eid) 237 { 238 struct ath10k *ar = htc->ar; 239 int status = 0; 240 struct ath10k_htc_record *record; 241 u8 *orig_buffer; 242 int orig_length; 243 size_t len; 244 245 orig_buffer = buffer; 246 orig_length = length; 247 248 while (length > 0) { 249 record = (struct ath10k_htc_record *)buffer; 250 251 if (length < sizeof(record->hdr)) { 252 status = -EINVAL; 253 break; 254 } 255 256 if (record->hdr.len > length) { 257 /* no room left in buffer for record */ 258 ath10k_warn(ar, "Invalid record length: %d\n", 259 record->hdr.len); 260 status = -EINVAL; 261 break; 262 } 263 264 switch (record->hdr.id) { 265 case ATH10K_HTC_RECORD_CREDITS: 266 len = sizeof(struct ath10k_htc_credit_report); 267 if (record->hdr.len < len) { 268 ath10k_warn(ar, "Credit report too long\n"); 269 status = -EINVAL; 270 break; 271 } 272 ath10k_htc_process_credit_report(htc, 273 record->credit_report, 274 record->hdr.len, 275 src_eid); 276 break; 277 default: 278 ath10k_warn(ar, "Unhandled record: id:%d length:%d\n", 279 record->hdr.id, record->hdr.len); 280 break; 281 } 282 283 if (status) 284 break; 285 286 /* multiple records may be present in a trailer */ 287 buffer += sizeof(record->hdr) + record->hdr.len; 288 length -= sizeof(record->hdr) + record->hdr.len; 289 } 290 291 if (status) 292 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc rx bad trailer", "", 293 orig_buffer, orig_length); 294 295 return status; 296 } 297 298 void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb) 299 { 300 int status = 0; 301 struct ath10k_htc *htc = &ar->htc; 302 struct ath10k_htc_hdr *hdr; 303 struct ath10k_htc_ep *ep; 304 u16 payload_len; 305 u32 trailer_len = 0; 306 size_t min_len; 307 u8 eid; 308 bool trailer_present; 309 310 hdr = (struct ath10k_htc_hdr *)skb->data; 311 skb_pull(skb, sizeof(*hdr)); 312 313 eid = hdr->eid; 314 315 if (eid >= ATH10K_HTC_EP_COUNT) { 316 ath10k_warn(ar, "HTC Rx: invalid eid %d\n", eid); 317 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad header", "", 318 hdr, sizeof(*hdr)); 319 goto out; 320 } 321 322 ep = &htc->endpoint[eid]; 323 324 payload_len = __le16_to_cpu(hdr->len); 325 326 if (payload_len + sizeof(*hdr) > ATH10K_HTC_MAX_LEN) { 327 ath10k_warn(ar, "HTC rx frame too long, len: %zu\n", 328 payload_len + sizeof(*hdr)); 329 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", "", 330 hdr, sizeof(*hdr)); 331 goto out; 332 } 333 334 if (skb->len < payload_len) { 335 ath10k_dbg(ar, ATH10K_DBG_HTC, 336 "HTC Rx: insufficient length, got %d, expected %d\n", 337 skb->len, payload_len); 338 ath10k_dbg_dump(ar, ATH10K_DBG_HTC, "htc bad rx pkt len", 339 "", hdr, sizeof(*hdr)); 340 goto out; 341 } 342 343 /* get flags to check for trailer */ 344 trailer_present = hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT; 345 if (trailer_present) { 346 u8 *trailer; 347 348 trailer_len = hdr->trailer_len; 349 min_len = sizeof(struct ath10k_ath10k_htc_record_hdr); 350 351 if ((trailer_len < min_len) || 352 (trailer_len > payload_len)) { 353 ath10k_warn(ar, "Invalid trailer length: %d\n", 354 trailer_len); 355 goto out; 356 } 357 358 trailer = (u8 *)hdr; 359 trailer += sizeof(*hdr); 360 trailer += payload_len; 361 trailer -= trailer_len; 362 status = ath10k_htc_process_trailer(htc, trailer, 363 trailer_len, hdr->eid); 364 if (status) 365 goto out; 366 367 skb_trim(skb, skb->len - trailer_len); 368 } 369 370 if (((int)payload_len - (int)trailer_len) <= 0) 371 /* zero length packet with trailer data, just drop these */ 372 goto out; 373 374 if (eid == ATH10K_HTC_EP_0) { 375 struct ath10k_htc_msg *msg = (struct ath10k_htc_msg *)skb->data; 376 377 switch (__le16_to_cpu(msg->hdr.message_id)) { 378 case ATH10K_HTC_MSG_READY_ID: 379 case ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID: 380 /* handle HTC control message */ 381 if (completion_done(&htc->ctl_resp)) { 382 /* 383 * this is a fatal error, target should not be 384 * sending unsolicited messages on the ep 0 385 */ 386 ath10k_warn(ar, "HTC rx ctrl still processing\n"); 387 complete(&htc->ctl_resp); 388 goto out; 389 } 390 391 htc->control_resp_len = 392 min_t(int, skb->len, 393 ATH10K_HTC_MAX_CTRL_MSG_LEN); 394 395 memcpy(htc->control_resp_buffer, skb->data, 396 htc->control_resp_len); 397 398 complete(&htc->ctl_resp); 399 break; 400 case ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE: 401 htc->htc_ops.target_send_suspend_complete(ar); 402 break; 403 default: 404 ath10k_warn(ar, "ignoring unsolicited htc ep0 event\n"); 405 break; 406 } 407 goto out; 408 } 409 410 ath10k_dbg(ar, ATH10K_DBG_HTC, "htc rx completion ep %d skb %pK\n", 411 eid, skb); 412 ep->ep_ops.ep_rx_complete(ar, skb); 413 414 /* skb is now owned by the rx completion handler */ 415 skb = NULL; 416 out: 417 kfree_skb(skb); 418 } 419 EXPORT_SYMBOL(ath10k_htc_rx_completion_handler); 420 421 static void ath10k_htc_control_rx_complete(struct ath10k *ar, 422 struct sk_buff *skb) 423 { 424 /* This is unexpected. FW is not supposed to send regular rx on this 425 * endpoint. 426 */ 427 ath10k_warn(ar, "unexpected htc rx\n"); 428 kfree_skb(skb); 429 } 430 431 /***************/ 432 /* Init/Deinit */ 433 /***************/ 434 435 static const char *htc_service_name(enum ath10k_htc_svc_id id) 436 { 437 switch (id) { 438 case ATH10K_HTC_SVC_ID_RESERVED: 439 return "Reserved"; 440 case ATH10K_HTC_SVC_ID_RSVD_CTRL: 441 return "Control"; 442 case ATH10K_HTC_SVC_ID_WMI_CONTROL: 443 return "WMI"; 444 case ATH10K_HTC_SVC_ID_WMI_DATA_BE: 445 return "DATA BE"; 446 case ATH10K_HTC_SVC_ID_WMI_DATA_BK: 447 return "DATA BK"; 448 case ATH10K_HTC_SVC_ID_WMI_DATA_VI: 449 return "DATA VI"; 450 case ATH10K_HTC_SVC_ID_WMI_DATA_VO: 451 return "DATA VO"; 452 case ATH10K_HTC_SVC_ID_NMI_CONTROL: 453 return "NMI Control"; 454 case ATH10K_HTC_SVC_ID_NMI_DATA: 455 return "NMI Data"; 456 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: 457 return "HTT Data"; 458 case ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS: 459 return "RAW"; 460 } 461 462 return "Unknown"; 463 } 464 465 static void ath10k_htc_reset_endpoint_states(struct ath10k_htc *htc) 466 { 467 struct ath10k_htc_ep *ep; 468 int i; 469 470 for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { 471 ep = &htc->endpoint[i]; 472 ep->service_id = ATH10K_HTC_SVC_ID_UNUSED; 473 ep->max_ep_message_len = 0; 474 ep->max_tx_queue_depth = 0; 475 ep->eid = i; 476 ep->htc = htc; 477 ep->tx_credit_flow_enabled = true; 478 } 479 } 480 481 static u8 ath10k_htc_get_credit_allocation(struct ath10k_htc *htc, 482 u16 service_id) 483 { 484 u8 allocation = 0; 485 486 /* The WMI control service is the only service with flow control. 487 * Let it have all transmit credits. 488 */ 489 if (service_id == ATH10K_HTC_SVC_ID_WMI_CONTROL) 490 allocation = htc->total_transmit_credits; 491 492 return allocation; 493 } 494 495 int ath10k_htc_wait_target(struct ath10k_htc *htc) 496 { 497 struct ath10k *ar = htc->ar; 498 int i, status = 0; 499 unsigned long time_left; 500 struct ath10k_htc_svc_conn_req conn_req; 501 struct ath10k_htc_svc_conn_resp conn_resp; 502 struct ath10k_htc_msg *msg; 503 u16 message_id; 504 u16 credit_count; 505 u16 credit_size; 506 507 time_left = wait_for_completion_timeout(&htc->ctl_resp, 508 ATH10K_HTC_WAIT_TIMEOUT_HZ); 509 if (!time_left) { 510 /* Workaround: In some cases the PCI HIF doesn't 511 * receive interrupt for the control response message 512 * even if the buffer was completed. It is suspected 513 * iomap writes unmasking PCI CE irqs aren't propagated 514 * properly in KVM PCI-passthrough sometimes. 515 */ 516 ath10k_warn(ar, "failed to receive control response completion, polling..\n"); 517 518 for (i = 0; i < CE_COUNT; i++) 519 ath10k_hif_send_complete_check(htc->ar, i, 1); 520 521 time_left = 522 wait_for_completion_timeout(&htc->ctl_resp, 523 ATH10K_HTC_WAIT_TIMEOUT_HZ); 524 525 if (!time_left) 526 status = -ETIMEDOUT; 527 } 528 529 if (status < 0) { 530 ath10k_err(ar, "ctl_resp never came in (%d)\n", status); 531 return status; 532 } 533 534 if (htc->control_resp_len < sizeof(msg->hdr) + sizeof(msg->ready)) { 535 ath10k_err(ar, "Invalid HTC ready msg len:%d\n", 536 htc->control_resp_len); 537 return -ECOMM; 538 } 539 540 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 541 message_id = __le16_to_cpu(msg->hdr.message_id); 542 credit_count = __le16_to_cpu(msg->ready.credit_count); 543 credit_size = __le16_to_cpu(msg->ready.credit_size); 544 545 if (message_id != ATH10K_HTC_MSG_READY_ID) { 546 ath10k_err(ar, "Invalid HTC ready msg: 0x%x\n", message_id); 547 return -ECOMM; 548 } 549 550 htc->total_transmit_credits = credit_count; 551 htc->target_credit_size = credit_size; 552 553 ath10k_dbg(ar, ATH10K_DBG_HTC, 554 "Target ready! transmit resources: %d size:%d\n", 555 htc->total_transmit_credits, 556 htc->target_credit_size); 557 558 if ((htc->total_transmit_credits == 0) || 559 (htc->target_credit_size == 0)) { 560 ath10k_err(ar, "Invalid credit size received\n"); 561 return -ECOMM; 562 } 563 564 /* setup our pseudo HTC control endpoint connection */ 565 memset(&conn_req, 0, sizeof(conn_req)); 566 memset(&conn_resp, 0, sizeof(conn_resp)); 567 conn_req.ep_ops.ep_tx_complete = ath10k_htc_control_tx_complete; 568 conn_req.ep_ops.ep_rx_complete = ath10k_htc_control_rx_complete; 569 conn_req.max_send_queue_depth = ATH10K_NUM_CONTROL_TX_BUFFERS; 570 conn_req.service_id = ATH10K_HTC_SVC_ID_RSVD_CTRL; 571 572 /* connect fake service */ 573 status = ath10k_htc_connect_service(htc, &conn_req, &conn_resp); 574 if (status) { 575 ath10k_err(ar, "could not connect to htc service (%d)\n", 576 status); 577 return status; 578 } 579 580 return 0; 581 } 582 583 int ath10k_htc_connect_service(struct ath10k_htc *htc, 584 struct ath10k_htc_svc_conn_req *conn_req, 585 struct ath10k_htc_svc_conn_resp *conn_resp) 586 { 587 struct ath10k *ar = htc->ar; 588 struct ath10k_htc_msg *msg; 589 struct ath10k_htc_conn_svc *req_msg; 590 struct ath10k_htc_conn_svc_response resp_msg_dummy; 591 struct ath10k_htc_conn_svc_response *resp_msg = &resp_msg_dummy; 592 enum ath10k_htc_ep_id assigned_eid = ATH10K_HTC_EP_COUNT; 593 struct ath10k_htc_ep *ep; 594 struct sk_buff *skb; 595 unsigned int max_msg_size = 0; 596 int length, status; 597 unsigned long time_left; 598 bool disable_credit_flow_ctrl = false; 599 u16 message_id, service_id, flags = 0; 600 u8 tx_alloc = 0; 601 602 /* special case for HTC pseudo control service */ 603 if (conn_req->service_id == ATH10K_HTC_SVC_ID_RSVD_CTRL) { 604 disable_credit_flow_ctrl = true; 605 assigned_eid = ATH10K_HTC_EP_0; 606 max_msg_size = ATH10K_HTC_MAX_CTRL_MSG_LEN; 607 memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); 608 goto setup; 609 } 610 611 tx_alloc = ath10k_htc_get_credit_allocation(htc, 612 conn_req->service_id); 613 if (!tx_alloc) 614 ath10k_dbg(ar, ATH10K_DBG_BOOT, 615 "boot htc service %s does not allocate target credits\n", 616 htc_service_name(conn_req->service_id)); 617 618 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 619 if (!skb) { 620 ath10k_err(ar, "Failed to allocate HTC packet\n"); 621 return -ENOMEM; 622 } 623 624 length = sizeof(msg->hdr) + sizeof(msg->connect_service); 625 skb_put(skb, length); 626 memset(skb->data, 0, length); 627 628 msg = (struct ath10k_htc_msg *)skb->data; 629 msg->hdr.message_id = 630 __cpu_to_le16(ATH10K_HTC_MSG_CONNECT_SERVICE_ID); 631 632 flags |= SM(tx_alloc, ATH10K_HTC_CONN_FLAGS_RECV_ALLOC); 633 634 /* Only enable credit flow control for WMI ctrl service */ 635 if (conn_req->service_id != ATH10K_HTC_SVC_ID_WMI_CONTROL) { 636 flags |= ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 637 disable_credit_flow_ctrl = true; 638 } 639 640 req_msg = &msg->connect_service; 641 req_msg->flags = __cpu_to_le16(flags); 642 req_msg->service_id = __cpu_to_le16(conn_req->service_id); 643 644 reinit_completion(&htc->ctl_resp); 645 646 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 647 if (status) { 648 kfree_skb(skb); 649 return status; 650 } 651 652 /* wait for response */ 653 time_left = wait_for_completion_timeout(&htc->ctl_resp, 654 ATH10K_HTC_CONN_SVC_TIMEOUT_HZ); 655 if (!time_left) { 656 ath10k_err(ar, "Service connect timeout\n"); 657 return -ETIMEDOUT; 658 } 659 660 /* we controlled the buffer creation, it's aligned */ 661 msg = (struct ath10k_htc_msg *)htc->control_resp_buffer; 662 resp_msg = &msg->connect_service_response; 663 message_id = __le16_to_cpu(msg->hdr.message_id); 664 service_id = __le16_to_cpu(resp_msg->service_id); 665 666 if ((message_id != ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || 667 (htc->control_resp_len < sizeof(msg->hdr) + 668 sizeof(msg->connect_service_response))) { 669 ath10k_err(ar, "Invalid resp message ID 0x%x", message_id); 670 return -EPROTO; 671 } 672 673 ath10k_dbg(ar, ATH10K_DBG_HTC, 674 "HTC Service %s connect response: status: 0x%x, assigned ep: 0x%x\n", 675 htc_service_name(service_id), 676 resp_msg->status, resp_msg->eid); 677 678 conn_resp->connect_resp_code = resp_msg->status; 679 680 /* check response status */ 681 if (resp_msg->status != ATH10K_HTC_CONN_SVC_STATUS_SUCCESS) { 682 ath10k_err(ar, "HTC Service %s connect request failed: 0x%x)\n", 683 htc_service_name(service_id), 684 resp_msg->status); 685 return -EPROTO; 686 } 687 688 assigned_eid = (enum ath10k_htc_ep_id)resp_msg->eid; 689 max_msg_size = __le16_to_cpu(resp_msg->max_msg_size); 690 691 setup: 692 693 if (assigned_eid >= ATH10K_HTC_EP_COUNT) 694 return -EPROTO; 695 696 if (max_msg_size == 0) 697 return -EPROTO; 698 699 ep = &htc->endpoint[assigned_eid]; 700 ep->eid = assigned_eid; 701 702 if (ep->service_id != ATH10K_HTC_SVC_ID_UNUSED) 703 return -EPROTO; 704 705 /* return assigned endpoint to caller */ 706 conn_resp->eid = assigned_eid; 707 conn_resp->max_msg_len = __le16_to_cpu(resp_msg->max_msg_size); 708 709 /* setup the endpoint */ 710 ep->service_id = conn_req->service_id; 711 ep->max_tx_queue_depth = conn_req->max_send_queue_depth; 712 ep->max_ep_message_len = __le16_to_cpu(resp_msg->max_msg_size); 713 ep->tx_credits = tx_alloc; 714 715 /* copy all the callbacks */ 716 ep->ep_ops = conn_req->ep_ops; 717 718 status = ath10k_hif_map_service_to_pipe(htc->ar, 719 ep->service_id, 720 &ep->ul_pipe_id, 721 &ep->dl_pipe_id); 722 if (status) 723 return status; 724 725 ath10k_dbg(ar, ATH10K_DBG_BOOT, 726 "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", 727 htc_service_name(ep->service_id), ep->ul_pipe_id, 728 ep->dl_pipe_id, ep->eid); 729 730 if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { 731 ep->tx_credit_flow_enabled = false; 732 ath10k_dbg(ar, ATH10K_DBG_BOOT, 733 "boot htc service '%s' eid %d TX flow control disabled\n", 734 htc_service_name(ep->service_id), assigned_eid); 735 } 736 737 return status; 738 } 739 740 struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size) 741 { 742 struct sk_buff *skb; 743 744 skb = dev_alloc_skb(size + sizeof(struct ath10k_htc_hdr)); 745 if (!skb) 746 return NULL; 747 748 skb_reserve(skb, sizeof(struct ath10k_htc_hdr)); 749 750 /* FW/HTC requires 4-byte aligned streams */ 751 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 752 ath10k_warn(ar, "Unaligned HTC tx skb\n"); 753 754 return skb; 755 } 756 757 int ath10k_htc_start(struct ath10k_htc *htc) 758 { 759 struct ath10k *ar = htc->ar; 760 struct sk_buff *skb; 761 int status = 0; 762 struct ath10k_htc_msg *msg; 763 764 skb = ath10k_htc_build_tx_ctrl_skb(htc->ar); 765 if (!skb) 766 return -ENOMEM; 767 768 skb_put(skb, sizeof(msg->hdr) + sizeof(msg->setup_complete_ext)); 769 memset(skb->data, 0, skb->len); 770 771 msg = (struct ath10k_htc_msg *)skb->data; 772 msg->hdr.message_id = 773 __cpu_to_le16(ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID); 774 775 ath10k_dbg(ar, ATH10K_DBG_HTC, "HTC is using TX credit flow control\n"); 776 777 status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); 778 if (status) { 779 kfree_skb(skb); 780 return status; 781 } 782 783 return 0; 784 } 785 786 /* registered target arrival callback from the HIF layer */ 787 int ath10k_htc_init(struct ath10k *ar) 788 { 789 struct ath10k_htc_ep *ep = NULL; 790 struct ath10k_htc *htc = &ar->htc; 791 792 spin_lock_init(&htc->tx_lock); 793 794 ath10k_htc_reset_endpoint_states(htc); 795 796 htc->ar = ar; 797 798 /* Get HIF default pipe for HTC message exchange */ 799 ep = &htc->endpoint[ATH10K_HTC_EP_0]; 800 801 ath10k_hif_get_default_pipe(ar, &ep->ul_pipe_id, &ep->dl_pipe_id); 802 803 init_completion(&htc->ctl_resp); 804 805 return 0; 806 } 807